#include <Arduino.h>

void Uart_Rec(unsigned int rec_sta)
{
    Serial.println("收到了：" + String(rec_sta));
}

void setup() {
    Serial.begin(115200);
    delay(500);
// write your initialization code here
}

void loop() {
    delay(500);
    Serial.println("hello, world");
    Uart_Rec(10);
// write your code here
}